Set active and rest durations, rounds, and an optional preparation countdown, then run the sequence locally in your browser.
Capture the current duration, state and projected finish, then run a short local clock-integrity check. This reads the existing timer controls; it does not replace the timer engine.
Start with a direct timer, stopwatch, alarm or focus workflow. Calendar, date arithmetic, clocks and scheduling specialists remain available from the full Date & Time hub.
Short phase cues plus a repeating final alarm. The default is intentionally audible and repeats until you dismiss it.
WebToolArc can use the browser's full configured output level, but it cannot override a muted tab, muted device, system-volume limits, Bluetooth routing, browser background throttling or device sleep. Test the sound on the device you will actually use.
Load a common timing pattern into the existing timer, review the fields, then run the same core engine above.
Set active and rest durations, rounds, and an optional preparation countdown, then run the sequence locally in your browser.
Run repeating active/rest intervals with configurable rounds and preparation time.
A one-click Tabata, HIIT, boxing, or equal-interval preset only fills the timer fields. It does not decide whether that workload is appropriate for a particular person or activity. Review active time, rest time, rounds, and preparation before pressing Start.
A short difference in one interval is multiplied across every round. Confirm the planned duration shown by the timer after changing a preset or custom values so a session does not become much longer or shorter than intended.
Skipping marks the current segment as complete and advances to the next segment. Use it when the session itself changes, not to correct a timer that appears delayed. If timing accuracy is in doubt, pause and use the existing clock-integrity audit instead.
The timer uses elapsed clock time, but browsers can throttle callbacks, devices can sleep, and audio can be muted or rerouted. Test the selected sound and keep the device awake when phase cues matter.
For repeatable sessions, record active seconds, rest seconds, rounds, preparation time, and the selected sound. The protocol name alone is not enough because two people can use the same label with different timing values.
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